It makes a mockery of the idea of journalistic integrity. The beheading video is billed as an ISIS propaganda piece, so does anyone actually think that adding more propaganda would legitimize it? Methinks not.
There is simply no good from adding corporate enforced! bias, for funding or whatever. The objectionable parts are not the news, nor a beheading. The objectionable part is the context, which includes things like trolls or even auto-starting videos on facebook. I've dropped people for less, for sharing auto-starting gore videos.
Consumers should have a choice to watch or not, Editors should use discretion, Newscasters should add context and background for proper interpretation.
But for all that is holy and truthful, forcing propaganda into news just to be broadcast is the worst idea I've ever heard.